DE2309767A1 - Schwellwertschaltung fuer signalempfaenger, insbesondere fuer tonfrequenzsignalempfaenger in fernsprechanlagen - Google Patents

Schwellwertschaltung fuer signalempfaenger, insbesondere fuer tonfrequenzsignalempfaenger in fernsprechanlagen

Info

Publication number
DE2309767A1
DE2309767A1 DE19732309767 DE2309767A DE2309767A1 DE 2309767 A1 DE2309767 A1 DE 2309767A1 DE 19732309767 DE19732309767 DE 19732309767 DE 2309767 A DE2309767 A DE 2309767A DE 2309767 A1 DE2309767 A1 DE 2309767A1
Authority
DE
Germany
Prior art keywords
voltage
output
circuit
operational amplifier
reference voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
DE19732309767
Other languages
German (de)
English (en)
Inventor
Horace K Frost
Jun Daniele Sellari
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of DE2309767A1 publication Critical patent/DE2309767A1/de
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Manipulation Of Pulses (AREA)
  • Noise Elimination (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Amplifiers (AREA)
  • Networks Using Active Elements (AREA)
DE19732309767 1972-03-03 1973-02-27 Schwellwertschaltung fuer signalempfaenger, insbesondere fuer tonfrequenzsignalempfaenger in fernsprechanlagen Pending DE2309767A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US23155672A 1972-03-03 1972-03-03

Publications (1)

Publication Number Publication Date
DE2309767A1 true DE2309767A1 (de) 1973-10-31

Family

ID=22869728

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19732309767 Pending DE2309767A1 (de) 1972-03-03 1973-02-27 Schwellwertschaltung fuer signalempfaenger, insbesondere fuer tonfrequenzsignalempfaenger in fernsprechanlagen

Country Status (8)

Country Link
US (1) US3743950A (enrdf_load_html_response)
BE (1) BE796249A (enrdf_load_html_response)
CA (1) CA980877A (enrdf_load_html_response)
DE (1) DE2309767A1 (enrdf_load_html_response)
ES (1) ES412306A1 (enrdf_load_html_response)
FR (1) FR2174979B1 (enrdf_load_html_response)
GB (1) GB1416601A (enrdf_load_html_response)
NL (1) NL7303059A (enrdf_load_html_response)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2948676A1 (de) * 1978-12-07 1980-06-19 Western Electric Co Detektor fuer mehrfrequenzsignale

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3959667A (en) * 1972-12-18 1976-05-25 Allis-Chalmers Corporation Overcurrent trip device
US3797894A (en) * 1973-01-24 1974-03-19 Bendix Corp Combination peak detector and level detector for use in an adaptive braking system
JPS49123706A (enrdf_load_html_response) * 1973-03-30 1974-11-27
US3935392A (en) * 1974-01-17 1976-01-27 Smith Lloyd M Dial pulse detection method and apparatus
JPS5642181B2 (enrdf_load_html_response) * 1974-05-25 1981-10-02
US3999083A (en) * 1975-03-31 1976-12-21 The United States Of America As Represented By The Secretary Of The Navy Automatic threshold circuit
US4164713A (en) * 1977-01-28 1979-08-14 Bell Telephone Laboratories, Incorporated Dual mode telephone subscriber loop current detector
FR2467407A1 (fr) * 1979-10-15 1981-04-17 Jaeger Dispositif de mesure des valeurs cretes d'un phenomene non periodique a recurrence faible
EP0233258A1 (en) * 1985-08-16 1987-08-26 BROWN, David Electromyographic repetitive strain injury monitor
JP2591301B2 (ja) * 1990-09-27 1997-03-19 日本電気株式会社 折れ線特性回路
US6232832B1 (en) * 1994-07-19 2001-05-15 Honeywell International Inc Circuit for limiting an output voltage to a percent of a variable supply voltage

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3119984A (en) * 1960-12-22 1964-01-28 Ibm Analog voltage memory
US3454787A (en) * 1966-05-06 1969-07-08 Bendix Corp Monitor and delay network comprising feedback amplifier,sample and hold circuit and threshold detector combination for error signal level detector
DE2010171B1 (enrdf_load_html_response) * 1970-03-04 1971-10-07 Krone Kg

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2948676A1 (de) * 1978-12-07 1980-06-19 Western Electric Co Detektor fuer mehrfrequenzsignale

Also Published As

Publication number Publication date
BE796249A (nl) 1973-09-05
FR2174979B1 (enrdf_load_html_response) 1978-03-10
FR2174979A1 (enrdf_load_html_response) 1973-10-19
ES412306A1 (es) 1976-01-01
NL7303059A (enrdf_load_html_response) 1973-09-06
AU5286873A (en) 1974-09-05
CA980877A (en) 1975-12-30
GB1416601A (en) 1975-12-03
US3743950A (en) 1973-07-03

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Legal Events

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